QEMU has a way to deprecate CPUs by setting the 'deprecation_note' in
CPUClass.
Currently PowerPC CPUs don't use this deprecation process.
Introduce 'POWERPC_DEPRECATED_CPU' macro to deprecate particular PowerPC
CPUs in future.
With the change, QEMU will print a warning like below when the
deprecated CPU/Chips are used (example output if power8nvl is deprecated):
$ ./build/qemu-system-ppc64 -M powernv8 --cpu power8nvl -nographic
qemu-system-ppc64: warning: CPU model power8nvl_v1.0-powerpc64-cpu is deprecated -- CPU is unmaintained.
...
Also, print '(deprecated)' for deprecated CPUs in 'qemu-system-ppc64
--cpu ?' (example output if power8nvl is deprecated):
$ ./build/qemu-system-ppc64 --cpu help
...
power8e (alias for power8e_v2.1)
power8nvl_v1.0 PVR 004c0100 (deprecated)
power8nvl (alias for power8nvl_v1.0)
power8_v2.0 PVR 004d0200
...
Suggested-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Aditya Gupta <adityag@linux.ibm.com>
---
target/ppc/cpu-models.c | 12 +++++++++++-
target/ppc/cpu_init.c | 7 ++++++-
2 files changed, 17 insertions(+), 2 deletions(-)
diff --git a/target/ppc/cpu-models.c b/target/ppc/cpu-models.c
index ece348178188..78ef23b4c4b8 100644
--- a/target/ppc/cpu-models.c
+++ b/target/ppc/cpu-models.c
@@ -32,17 +32,20 @@
/* PowerPC CPU definitions */
#define POWERPC_DEF_PREFIX(pvr, svr, type) \
glue(glue(glue(glue(pvr, _), svr), _), type)
-#define POWERPC_DEF_SVR(_name, _desc, _pvr, _svr, _type) \
+#define POWERPC_DEF_SVR_DEPR(_name, _desc, _pvr, _svr, _type, _deprecation_note) \
static void \
glue(POWERPC_DEF_PREFIX(_pvr, _svr, _type), _cpu_class_init) \
(ObjectClass *oc, void *data) \
{ \
DeviceClass *dc = DEVICE_CLASS(oc); \
+ CPUClass *cc = CPU_CLASS(oc); \
PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc); \
\
pcc->pvr = _pvr; \
pcc->svr = _svr; \
dc->desc = _desc; \
+ \
+ cc->deprecation_note = _deprecation_note; \
} \
\
static const TypeInfo \
@@ -63,6 +66,13 @@
type_init( \
glue(POWERPC_DEF_PREFIX(_pvr, _svr, _type), _cpu_register_types))
+#define POWERPC_DEF_SVR(_name, _desc, _pvr, _svr, _type) \
+ POWERPC_DEF_SVR_DEPR(_name, _desc, _pvr, _svr, _type, NULL)
+
+#define POWERPC_DEPRECATED_CPU(_name, _pvr, _type, _desc, _deprecation_note)\
+ POWERPC_DEF_SVR_DEPR(_name, _desc, _pvr, POWERPC_SVR_NONE, _type, \
+ _deprecation_note)
+
#define POWERPC_DEF(_name, _pvr, _type, _desc) \
POWERPC_DEF_SVR(_name, _desc, _pvr, POWERPC_SVR_NONE, _type)
diff --git a/target/ppc/cpu_init.c b/target/ppc/cpu_init.c
index f81cb680fc38..78a25637ad4f 100644
--- a/target/ppc/cpu_init.c
+++ b/target/ppc/cpu_init.c
@@ -7144,6 +7144,7 @@ static void ppc_cpu_list_entry(gpointer data, gpointer user_data)
{
ObjectClass *oc = data;
PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
+ CPUClass *cc = CPU_CLASS(oc);
DeviceClass *family = DEVICE_CLASS(ppc_cpu_get_family_class(pcc));
const char *typename = object_class_get_name(oc);
char *name;
@@ -7154,7 +7155,11 @@ static void ppc_cpu_list_entry(gpointer data, gpointer user_data)
}
name = cpu_model_from_type(typename);
- qemu_printf(" %-16s PVR %08x\n", name, pcc->pvr);
+ if (cc->deprecation_note) {
+ qemu_printf(" %-16s PVR %08x (deprecated)\n", name, pcc->pvr);
+ } else {
+ qemu_printf(" %-16s PVR %08x\n", name, pcc->pvr);
+ }
for (i = 0; ppc_cpu_aliases[i].alias != NULL; i++) {
PowerPCCPUAlias *alias = &ppc_cpu_aliases[i];
ObjectClass *alias_oc = ppc_cpu_class_by_name(alias->model);
--
2.49.0
On 4/22/25 06:41, Aditya Gupta wrote:
> QEMU has a way to deprecate CPUs by setting the 'deprecation_note' in
> CPUClass.
>
> Currently PowerPC CPUs don't use this deprecation process.
>
> Introduce 'POWERPC_DEPRECATED_CPU' macro to deprecate particular PowerPC
> CPUs in future.
>
> With the change, QEMU will print a warning like below when the
> deprecated CPU/Chips are used (example output if power8nvl is deprecated):
>
> $ ./build/qemu-system-ppc64 -M powernv8 --cpu power8nvl -nographic
> qemu-system-ppc64: warning: CPU model power8nvl_v1.0-powerpc64-cpu is deprecated -- CPU is unmaintained.
> ...
>
> Also, print '(deprecated)' for deprecated CPUs in 'qemu-system-ppc64
> --cpu ?' (example output if power8nvl is deprecated):
>
> $ ./build/qemu-system-ppc64 --cpu help
> ...
> power8e (alias for power8e_v2.1)
> power8nvl_v1.0 PVR 004c0100 (deprecated)
> power8nvl (alias for power8nvl_v1.0)
> power8_v2.0 PVR 004d0200
> ...
>
> Suggested-by: Cédric Le Goater <clg@kaod.org>
> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> Signed-off-by: Aditya Gupta <adityag@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Thanks,
C.
> ---
> target/ppc/cpu-models.c | 12 +++++++++++-
> target/ppc/cpu_init.c | 7 ++++++-
> 2 files changed, 17 insertions(+), 2 deletions(-)
>
> diff --git a/target/ppc/cpu-models.c b/target/ppc/cpu-models.c
> index ece348178188..78ef23b4c4b8 100644
> --- a/target/ppc/cpu-models.c
> +++ b/target/ppc/cpu-models.c
> @@ -32,17 +32,20 @@
> /* PowerPC CPU definitions */
> #define POWERPC_DEF_PREFIX(pvr, svr, type) \
> glue(glue(glue(glue(pvr, _), svr), _), type)
> -#define POWERPC_DEF_SVR(_name, _desc, _pvr, _svr, _type) \
> +#define POWERPC_DEF_SVR_DEPR(_name, _desc, _pvr, _svr, _type, _deprecation_note) \
> static void \
> glue(POWERPC_DEF_PREFIX(_pvr, _svr, _type), _cpu_class_init) \
> (ObjectClass *oc, void *data) \
> { \
> DeviceClass *dc = DEVICE_CLASS(oc); \
> + CPUClass *cc = CPU_CLASS(oc); \
> PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc); \
> \
> pcc->pvr = _pvr; \
> pcc->svr = _svr; \
> dc->desc = _desc; \
> + \
> + cc->deprecation_note = _deprecation_note; \
> } \
> \
> static const TypeInfo \
> @@ -63,6 +66,13 @@
> type_init( \
> glue(POWERPC_DEF_PREFIX(_pvr, _svr, _type), _cpu_register_types))
>
> +#define POWERPC_DEF_SVR(_name, _desc, _pvr, _svr, _type) \
> + POWERPC_DEF_SVR_DEPR(_name, _desc, _pvr, _svr, _type, NULL)
> +
> +#define POWERPC_DEPRECATED_CPU(_name, _pvr, _type, _desc, _deprecation_note)\
> + POWERPC_DEF_SVR_DEPR(_name, _desc, _pvr, POWERPC_SVR_NONE, _type, \
> + _deprecation_note)
> +
> #define POWERPC_DEF(_name, _pvr, _type, _desc) \
> POWERPC_DEF_SVR(_name, _desc, _pvr, POWERPC_SVR_NONE, _type)
>
> diff --git a/target/ppc/cpu_init.c b/target/ppc/cpu_init.c
> index f81cb680fc38..78a25637ad4f 100644
> --- a/target/ppc/cpu_init.c
> +++ b/target/ppc/cpu_init.c
> @@ -7144,6 +7144,7 @@ static void ppc_cpu_list_entry(gpointer data, gpointer user_data)
> {
> ObjectClass *oc = data;
> PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
> + CPUClass *cc = CPU_CLASS(oc);
> DeviceClass *family = DEVICE_CLASS(ppc_cpu_get_family_class(pcc));
> const char *typename = object_class_get_name(oc);
> char *name;
> @@ -7154,7 +7155,11 @@ static void ppc_cpu_list_entry(gpointer data, gpointer user_data)
> }
>
> name = cpu_model_from_type(typename);
> - qemu_printf(" %-16s PVR %08x\n", name, pcc->pvr);
> + if (cc->deprecation_note) {
> + qemu_printf(" %-16s PVR %08x (deprecated)\n", name, pcc->pvr);
> + } else {
> + qemu_printf(" %-16s PVR %08x\n", name, pcc->pvr);
> + }
> for (i = 0; ppc_cpu_aliases[i].alias != NULL; i++) {
> PowerPCCPUAlias *alias = &ppc_cpu_aliases[i];
> ObjectClass *alias_oc = ppc_cpu_class_by_name(alias->model);
© 2016 - 2025 Red Hat, Inc.